Can I calculate the parasitic capacitance in Altium?
can i calculate it by altium? if yes, how? 
  


I can't answer that.


  
    if no, please provide a program untill i use it for solve my problem.
  


I assume your PCB trace is micro strip. You can use this calculator for example.

Fill in the required parameters:


W[m]  width of the trace
H[m]  height of dielectric above return plane
T[m]  trace thickness
Er[ ] relative permittivity of the dielectric


H is the distance between the trace and the GND plane below it. It depends on you PCB layer stack up.

Er depends on the dielectric of the PCB. Its About 4.3 for FR4. Look at the technical specifications from your PCB manufacturer.

As a result you get 


[F/m] capacitance per unit length


which is what you want. Be careful to convert all the values to SI-Units as required by the calculator from the example.