What is suitable format to present a Psuedo Code in academic paper? I'm going to include my algorithm as a pseudo-code in a double-column paper format. 

However, since lines of my pseudo-code are long I don't know if is it suitable to use the width of both columns to demonstrate algorithm or not? I want to know are there any common rules for this?
This depends on the journal's author guidelines. If no specifics are stated, you can often add the pseudo-code like a figure in your text (just labeled with Algorithm 1 instead of Figure 1).