Direct integration methods is used to solve nonlinear partial differential equations. At first nonlinear partial differential equations are transformed into the form of ordinary differential equations. Then, direct integration method is used to calculate. In the process of solving involves some knowledge of elliptic function. Finally, solition of nonlinear partial differential equations is obtained.%利用直接积分的方法求解非线性偏微分方程.在求解的过程中先将非线性偏微分方程化成常微分方程的形式；再运用直接积分法进行计算.在求解的过程涉及到了椭圆函数的一些知识.最后得到非线性偏微分方程的孤立子解.
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