The calculating formulae of weighted optimum curve regression model parameter given in this paper possesses high speed of parameter correcting, high precision of fitting and obvious effect.

The technological process of operation and strength regression curves have been researched by experiment.

The least square approach is applied to get regression curves and a design plan is proposed on the basis of the regression curves.

In view of the shortcoming of the general hyperbola regression two-parameter model, this paper introduces the third parameter establishes the hyperbola regression three-parameter model.

Using the method of curvilinearity regression,authors carry out the convergence treatment of the tunnel survey data,and confim the degree of convergence of the periphery of tunnels.