The development and improvement of the legal aid system is the major task proposed at the third and fourth plenary session of the 18th CPC Central Committee. It also closely connected to the System for Imposing Lenient Punishments on Those confessing to Their Crimes and Accepting Punishments in Criminal Cases. The fund guarantee mechanism is the most significant thing in order to bring the legal aid system to a new level. However，the funds allocated to each case and each province is insufficient and inadequate，which lead to the low willingness among lawyers in handling legal aid cases，and further impair the quality of services provided. Therefore，in order to solve these problems，there are two possible ways. On one hand，minimizing the regional difference by strengthen the role of financial support. On the other hand，reorganize the fund guarantee mechanism in accordance with the nature of legal aid.