Mugabe, at 90 Africa's oldest leader and one of its longest-serving, is visiting China this week. Officials say he will seek funds to rebuild decaying roads, rail and power facilities and to help mechanise Zimbabwe's agriculture.
Official data show China has extended $1 billion in loans to Zimbabwe since 2009 and trade between the two nations rose to $1 billion last year from $300 million five years ago.
Mugabe has increasingly leaned on China after being shunned by Western trade and financial partners. They have been put off by concern over human rights and alleged fraud in elections won by the president and his ZANU-PF party.
Announcing the drop in foreign direct investment, Reserve Bank of Zimbabwe governor John Mangudya said exports, mostly minerals and tobacco, were also down 13 percent in the first half of the year, to $1.3 billion, compared with the first six months of 2013.
The economy did return to growth in 2009, after nearly a decade of recession, when Mugabe was forced to share power with his opposition rivals. But his landslide victory last year has coincided with a rapid slowdown.
The government has cut its growth target for this year to 3.1 percent from 6.1 percent previously. Mangudya said the tough economic conditions had strained the capacity of companies and individuals to repay loans. The percentage of non-performing loans out of total loans had risen to 18.5 percent from 17 percent at the start of the year. Banks in turn have tightened their lending to customers. "Reduced credit is leading to a decline in economic growth, private consumption, job losses and decrease in government revenue," Mangudya said. Mangudya said liquidity problems among banks meant foreign banks like units of Barclays Bank plc and Standard Chartered and larger local lenders would have to raise their minimum capital to $100 million by 2020 from the current $25 million. Smaller banks would be required to maintain minimum capital of $25 million. Mangudya said in order to ease the dollar crunch in the economy, banks would now be required to keep only five percent of their foreign currency offshore, down from 30 percent.