The survey found there was 29% more litter than in 2002 and a whopping 99% more than the first survey back in 1994.
Plastic bags made up 50% of the litter found with 5,831 collected.
The MCS want a big reduction in the amount of plastic packaging used on items and would like the government to bring in tax on plastic bags.
But it's not just people that hate the sight of rubbish because litter can also be dangerous for wildlife.
Every year it's thought that many animals die because of being caught in, or, eating litter.