I got knee surgeries on both knees got MRI and got grade 2 intrameniscal tear posterior horn of the medial meniscus n mild myxiod will I need surgery?

It depends... Knee arthroscopy for a meniscal tear is an elective procedure that is performed based on pain, how it affects your function, and lifestyle. In the absence of locking, clicking, or pain limiting activity, surgery is not likely. This is especially true with an lesion within the substance of the meniscus as you describe. Preserve what meniscus you have remaining and consider joint health supplements.