New exact solutions to (n+1)-dimensional double sine-Gordon equation
(n+1)维双Sine-Gordon方程的新精确解

The auxiliary equation of triangular function type including the first kind of elliptic equation and the formula of superposition of the solutions are given. Then based on general function transformation, new Jacobi elliptic exact solutions to (n+1)-dimensional double sine-Gordon equation are constructed with aid of symbolic computation system Mathematica. And the solutions include Jacobi elliptic function exact solutions, exact solitary wave solutions and triangular functions.